13140344440 has 32 divisors (see below), whose sum is σ = 29653537680. Its totient is φ = 5240535552.

The previous prime is 13140344369. The next prime is 13140344447. The reversal of 13140344440 is 4444304131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13140344399 and 13140344408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140344447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473922 + ... + 500881.

Almost surely, 2^13140344440 is an apocalyptic number.

13140344440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140344440 is an abundant number, since it is smaller than the sum of its proper divisors (16513193240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13140344440 is a wasteful number, since it uses less digits than its factorization.

13140344440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975151 (or 975147 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 13140344440 its reverse (4444304131), we get a palindrome (17584648571).

The spelling of 13140344440 in words is "thirteen billion, one hundred forty million, three hundred forty-four thousand, four hundred forty".